公开(公告)号：US12234333B2

公开(公告)日：2025-02-25

申请号：US17359991

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  A01N25/10 ,  A01N25/34 ,  B65D65/46 ,  C11D3/37 ,  C11D17/04

Abstract: Provided are a water-soluble film preferably used for production of a package that has excellent surface gloss and has excellent anti-blocking properties, and a package using the same. A water-soluble film includes a polyvinyl alcohol resin, wherein the water-soluble film has a glossy surface with an average height SRc(G) of 1.8 μm or less and a maximum height SRz(G) of 20 μm or more and 50 μm or less.

公开(公告)号：US12071524B2

公开(公告)日：2024-08-27

申请号：US17360040

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto ,  Mitsunori Asada

IPC: C08J5/18 ,  C08L29/04

CPC classification number: C08J5/18 ,  C08J2329/04

Abstract: A water-soluble film is provided that is capable of achieving deformation resistance during pouch storage as well as excellent water solubility of the film and excellent reduction in undissolved residues. A water-soluble film includes a polyvinyl alcohol-based resin, wherein a crystal long period Ds obtained from an X-ray profile obtained by small-angle X-ray scattering measurement in a water/methanol mixed solvent (volume ratio: 2/8) is from 10.0 to 30.0 nm and a rate of increase (DS−Da)/Da of the crystal long period Ds to a crystal long period Da obtained by small-angle X-ray scattering measurement before immersion in the solvent is 30% or more and 130% or less.

公开(公告)号：US12049546B2

公开(公告)日：2024-07-30

申请号：US17360098

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  B41M5/50 ,  B65D65/42 ,  B65D65/46 ,  C08K5/053

CPC classification number: C08J5/18 ,  B41M5/502 ,  B65D65/42 ,  B65D65/46 ,  C08J2329/04 ,  C08J2331/04 ,  C08K5/053

Abstract: The present invention provides a monolayer base film for hydraulic transfer printing that is excellent in water solubility and allows high resolution transfer printing without rupture even in high speed printing and a film for hydraulic transfer printing using the same. The present invention is a base film for hydraulic transfer printing comprising a polyvinyl alcohol resin, the base film forming a printing layer to be transferred to an article by hydraulic transfer printing. In this base film for hydraulic transfer printing, the base film for hydraulic transfer printing has an amount (A1) of crystalline component of 60% or less and an amount (A2) of constrained amorphous component from 10% to 50%, the amounts being obtained from a spin-spin relaxation curve by 1H pulse NMR measurement of the base film in deuterated methanol, and a moisture content from 1 to 5 mass %.

公开(公告)号：US20230257536A1

公开(公告)日：2023-08-17

申请号：US18003791

申请日：2021-06-14

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  C08K5/17 ,  C08K3/34 ,  C11D17/04 ,  C11D3/395

CPC classification number: C08J5/18 ,  C08K5/17 ,  C08K3/34 ,  C11D17/043 ,  C11D3/3956 ,  C08J2329/04 ,  C08K2003/343

Abstract: [Problem to be solved] To provide a water-soluble film having good transparency and good releasability from a support with less surfactant content.
[Solution] A water-soluble film containing a polyvinyl alcohol resin and surfactant, wherein a content of the surfactant is 0.005 to 1 parts by mass with respect to 100 parts by mass of the polyvinyl alcohol resin, and a ratio S(0)/S(32) of an abundance amount S(0) of the surfactant on at least one surface of the water-soluble film to an abundance amount S(32) of the surfactant on a cross-section surface at a depth of 32 nm from the at least one surface of the water-soluble film, measured by a count number of fragment ions derived from the surfactant detected by time-of-flight secondary ion mass spectrometry on the at least one surface of the water-soluble film, is in the range of 100 to 500.

公开(公告)号：US20210324162A1

公开(公告)日：2021-10-21

申请号：US17360055

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto ,  Mitsunori Asada

IPC: C08J5/18 ,  C08K5/053 ,  B65D65/46

Abstract: A water-soluble film is provided that is excellent in film transparency and water solubility and inhibits sticking between the films. A water-soluble film includes a polyvinyl alcohol resin, wherein a crystallite size obtained from an X-ray profile obtained by wide-angle X-ray measurement is from 4.0 to 5.5 nm and a degree of crystallization obtained from the X-ray profile is from 10.0% to 25.0%, and an external haze is from 7.0% to 30.0%.

公开(公告)号：US20210324159A1

公开(公告)日：2021-10-21

申请号：US17360004

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  C11D17/04 ,  A01N25/34 ,  C08L29/04

Abstract: Provided are a water-soluble film capable of inhibiting sticking between the films while maintaining excellent water solubility and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated using a diamond prism is Fd1 and a crystallinity index calculated using a germanium prism is Fg1 for FT-IR measurement of a first surface of the water-soluble film by ATR technique, Fd1 and Fg1 are Fd1≤0.65 and Fd1/Fg1

公开(公告)号：US12054606B2

公开(公告)日：2024-08-06

申请号：US17868862

申请日：2022-07-20

Applicant: KURARAY CO., LTD.

Inventor： Osamu Kazeto ,  Yasutaka Inubushi

IPC: C08L29/04 ,  C08F10/06 ,  C08F216/06 ,  C08J5/18 ,  C08F116/06

CPC classification number: C08L29/04 ,  C08F216/06 ,  C08J5/18 ,  C08F116/06 ,  C08J2329/04 ,  C08L2203/16

Abstract: A method for discriminating a polyvinyl alcohol resin film containing a polyvinyl alcohol resin in which all or a part of carbon is derived from bio-derived ethylene from a polyvinyl alcohol resin film containing only a polyvinyl alcohol resin derived only from fossil fuel-derived ethylene by measuring an abundance ratio 14C/C of carbon 14 (14C) in total carbon.

公开(公告)号：US12018145B2

公开(公告)日：2024-06-25

申请号：US17789669

申请日：2021-10-14

Applicant: KURARAY CO., LTD.

Inventor： Osamu Kazeto ,  Yasutaka Inubushi

IPC: C08L29/04 ,  C08F116/06 ,  C08F216/06 ,  C08J5/18

CPC classification number: C08L29/04 ,  C08F216/06 ,  C08J5/18 ,  C08F116/06 ,  C08J2329/04 ,  C08L2203/16

Abstract: A PVA film containing PVA that does not increase carbon dioxide existing in the global environment or has a small increase amount even when carbon dioxide is generated by a biodegradation treatment or an incineration treatment. A polyvinyl alcohol resin film having a polyvinyl alcohol resin with an abundance ratio of carbon 14 in total carbon constituting the polyvinyl alcohol resin of 1.0×10−4 or more. A method for discriminating a polyvinyl alcohol resin film, the method including discriminating a polyvinyl alcohol resin film containing a polyvinyl alcohol resin (Ab) in which at least part of the carbon is derived from bio-derived ethylene.

公开(公告)号：US20230323046A1

公开(公告)日：2023-10-12

申请号：US18036639

申请日：2022-09-30

Applicant: KURARAY CO., LTD.

Inventor： Osamu Kazeto ,  Masahiro Takafuji

IPC: C08J5/18 ,  C08K5/053

CPC classification number: C08J5/18 ,  C08K5/053 ,  C08J2300/14 ,  C08J2329/04

Abstract: The present disclosure relates to a water-soluble film with polyvinyl alcohol having a polymerization degree of 100 to 3,000 and a polyhydric alcohol plasticizer.

公开(公告)号：US20230257534A1

公开(公告)日：2023-08-17

申请号：US18003771

申请日：2021-06-14

Applicant: KURARAY CO., LTD.

Inventor： Minoru Okamoto ,  Sayaka Shimizu ,  Osamu Kazeto

IPC: C08J5/18 ,  C08K5/053

CPC classification number: C08J5/18 ,  C08K5/053 ,  C08J2329/04

Abstract: [Problem to be solved] To provide a water-soluble film capable of which is excellent in water solubility and less likely to cause problems such as breakage of packaging material during storage and transportation by controlling the crystal long period structure of the PVA molecule and, for example, the degree of phase separation state between PVA and other components in the water-soluble film.